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An electric dipole consists of charges +...

An electric dipole consists of charges `+- 2.0 xx 10^(-8)` C separated by distance of `+- 2.0 xx 10^(-3)`m. It is placed at a distance of 6 cm from a line charge of linear charge density `4.0 xx 10^(-4) Cm^(-1)` as shown in figure such that the dipole makes an angle of `theta = 60^@` with line AB. Find the force acting on the dipole.

A

`0.012 N`

B

` 1.8 N`

C

` 0.04 N`

D

none of these

Text Solution

Verified by Experts

The correct Answer is:
C
`P=2xx10^(-4)xx2xx10^(-3)=4xx10^(-11)Cm`
`E=(lamda)/(2piepsilon_(0)x),F=pcostheta((dE)/(dx))`
`F=-(pcosthetalamda)/(2piepsilon_(0)x^(2))=(-4xx10^(-11)xxcos60^(@)xx4xx10^(-4))/((1)/(2xx9xx10^(9))xx((6)/(100))^(2))`
`=0.04N`
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